Why pilots do not "like" the minus lens

Discussion in 'Optometry Archives' started by Otis Brown, Oct 22, 2003.

  1. Otis Brown

    Otis Brown Guest

    Dear Judy,

    Subject: Why 20/20 is better than wearing glasses.

    Re: I see that the standard allows for the use of corrective lenses. So if
    corrective lenses are allowed, why are you so hot to have pilots attain
    20/20 without lenses? Dr Judy

    You are correct. Most airlines allow "correction" with a
    minus lens, although I believe Delta still requires
    naked eye 20/20.

    The pilot himself would have to answer your question.
    Of couse, the "easy way" is always the minus lens -- we
    ALL agree on that point.

    Dr. David L. Cook O.D., F.C.O.V.D., wrote a book
    on vision for pilots called, "Vision -- What Every
    Pilot Needs to Know". "Would 20/20 vision allow you
    to get on with the airline of your choice".
    He offers complete support to pilots who wish
    to clear their vision from 20/40 to 20/20.

    The various professional flight magazines have a consistent
    articles on how to maintin 20/20.

    For most people, their distant vision is casual, and
    they do not seem to mind losing it. For a pilot,
    even the slightest loss of vision (while in school)
    say from 20/20 to 20/30, is a serious career threat.

    I think the limit for a "corrective" lens is 20/100.
    There is serious evidence that the natural eye
    "adapts" to the minus lens -- my moving more minus.
    If the pilots gets below 20/100, then he has
    a problem with qualification -- with a minus lens.

    And of couse military pilots, and entry into
    the Airforce Academy. 20/20 is required for entry.
    ANYTHING less, and you do not qualify.


    Otis Brown, Oct 22, 2003
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  2. Otis Brown

    Kimi Guest

    I always thought it would be a great job to be a pilot. I guess my
    20/300 vision will not allow me. :-( Even though I am corrected to
    better than 20/20. A shame what bad vision does.
    Kimi, Oct 22, 2003
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  3. If a person is not myopic by the time they reach college (USAF Academy) what
    are the chances of becoming myopic from the required reading load? Has the
    USAF run any experiments to find out what causes myopia in their personnel?

    Repeating Decimal, Oct 22, 2003
  4. Otis Brown

    A Lieberman Guest

    Hi Otis.

    http://www.delta.com/inside/employment/pilot/index.jsp does not support
    the above statement. Do you have something different?
    I have been a member of AOPA for three years. I have not seen any
    articals of this nature. Could you please provide me some references?
    Magazine dates, and articals that I can refer to? I can check it on
    AOPA website as I am a member, and they have their entire magazine
    archived on the web. If it has been consistently published, surely I
    would have seen one in the past three years. My primary subscription is
    AOPA Pilot magazine, and I have read Flying magazine rather reqularly.
    Do you have anything to provide to support this.
    http://www.cami.jccbi.gov/AAM-300/part67.html#d67301 from the FAA
    guidelines do not support your statement, which most if not all airlines
    follow these guidelines. There is nothing stated about uncorrected

    Otis, so far you are batting zero when it comes to pilot requirements
    and qualifications. I am now really skeptical of what your website has
    to provide!

    I re-iterate, that I am not commenting on your thoughts on vision
    therapy or related to vision treatment. I will leave that to the
    professionals on this group, but what I am doing is trying to prevent
    you from diseminating VERY INACCURATE information about pilot
    qualifications. Please note, that when I state a position, that I
    provide (what I hope) are reliable web site sources. To be honest, I
    have not seen you do the same in regards to pilot qualifications.

    A Lieberman, Oct 22, 2003
  5. Not that I have any interest in becoming an Air Force pilot or in
    having corrective surgery, but I did check out that website out of
    curiosity, and was confused by this statement:
    Does anybody have any idea what the reasoning is behind this
    statement? Do people who have had corrective surgery have a high risk
    for anything that the Air Force might consider hazardous, or are their
    eyes as a rule in any way worse than people who have not had the

    Lothar of the Hill People, Oct 22, 2003
  6. Otis Brown

    Luke Scharf Guest

    Actually, all you need is a Class I or Class II FAA medical certificate if
    you want to fly for money. If you want to fly for fun, you need a Class
    III. There are some changes in the regs that will allow sport pilots to
    fly very small aircraft (bigger than an ultralight, but smaller than a
    typical General Aviation aircraft) with a "driver's license medical." In
    other words, if you can get a driver's license, you're fit to fly a Piper
    Cub. Of course, you'd still have to spend a lot of time with an
    instructor and pass the checkride.

    As posted before in this group, the requirements for an FAA medical
    certificate are here:

    If you want to see if you can fly, just schedule an appointment with your
    friendly local Aviation Medical Examiner. The AOPA will probably be quite
    happy to help you find one:

    Also, if you don't meet the requirements but can fly anyway, you can get a
    waiver for your condition. From what I've heard, this usually involves
    taking a quick flight with someone from your friendly local Flight
    Standards District Office (FSDO).

    Oh, and to stay on the subject, I'm a pilot, and I really like the -1.00
    lens that I recently had prescribed for my left eye. Just like anyone
    else, I'd rather have naturally perfect vision -- but the correction is
    very helpful, especially when looking for other aircraft.

    Flying is too good to be left to just super(wo)men. I've been taking
    swing dancing lessons, and I've found that, for me at least, landing an
    airplane is much easier than dancing. All you really have to worry about
    is how the wing is cutting into the (relative) wind. The rest of the
    stuff -- the runway, engine, weather, traffic, folks on the radio, regs,
    flight planning, and aircraft maintenence are important... But it's really
    all about the wing in the wind.

    Luke Scharf, Oct 22, 2003

  7. Very interesting! I guess I always assumed that the eyes were as good
    as new once you've fully recovered from refractive laser surgery. I
    didn't realize there were such lasting potential complications for
    some people.

    Lothar of the Hill People, Oct 23, 2003
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